Hotword: Make the new extension work with the NTP opt-in promo.

chrome/browser/resources/hotword/constants.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('hotword.constants', function() {
 'use strict';
 
 /**
  * Number of seconds of audio to record when logging is enabled.
  * @const {number}
@@ skipping 123 matching lines @@
  */
 var CommandToPage = {
   HOTWORD_VOICE_TRIGGER: 'vt',
   HOTWORD_STARTED: 'hs',
   HOTWORD_ENDED: 'hd',
   HOTWORD_TIMEOUT: 'ht',
   HOTWORD_ERROR: 'he'
 };
 
 /**
- * Messages sent from the Google page to the injected scripts
- * and then passed to the extension.
+ * Messages sent from the Google page to the extension or to the
+ * injected script and then passed to the extension.
  * @enum {string}
  */
 var CommandFromPage = {
   SPEECH_START: 'ss',
   SPEECH_END: 'se',
   SPEECH_RESET: 'sr',
   SHOWING_HOTWORD_START: 'shs',
   SHOWING_ERROR_MESSAGE: 'sem',
   SHOWING_TIMEOUT_MESSAGE: 'stm',
   CLICKED_RESUME: 'hcc',
   CLICKED_RESTART: 'hcr',
   CLICKED_DEBUG: 'hcd',
-  WAKE_UP_HELPER: 'wuh'
+  WAKE_UP_HELPER: 'wuh',
+  // Command specifically for the opt-in promo below this line.
+  // User has explicitly clicked 'no'.
+  CLICKED_NO_OPTIN: 'hcno',
+  // User has opted in.
+  CLICKED_OPTIN: 'hco',
+  // User clicked on the microphone.
+  PAGE_WAKEUP: 'wu'
 };
 
 /**
  * Source of a hotwording session request.
  * @enum {string}
  */
 var SessionSource = {
   LAUNCHER: 'launcher',
   NTP: 'ntp',
   ALWAYS: 'always',
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   SessionSource: SessionSource,
   TimeoutMs: TimeoutMs,
   UmaMediaStreamOpenResult: UmaMediaStreamOpenResult,
   UmaMetrics: UmaMetrics,
   UmaNaClMessageTimeout: UmaNaClMessageTimeout,
   UmaNaClPluginLoadResult: UmaNaClPluginLoadResult,
   UmaTriggerSource: UmaTriggerSource
 };
 
 });